| Issue |
89528
|
| Summary |
`flang-new` 19.0.0 bug: `sum([Inf, 0.0]) = NaN`, while `Inf + 0.0 = Inf`
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
zaikunzhang
|
Hi,
This is a bug of flang-new 19.0.0.
Code (latest version available at https://github.com/zequipe/test_compiler/blob/master/test_sum.f90):
```fortran
! test_sum.f90
program test_sum
use ieee_arithmetic, only : ieee_value, ieee_positive_inf
use iso_fortran_env, only : RP => REAL128 !REAL64 !REAL32 !REAL16
implicit none
real(RP) :: x(2), y, inf
inf = ieee_value(0.0_RP, ieee_positive_inf)
x = [inf, 0.0_RP]
y = sum(x)
print *, sum(x), x(1) + x(2)
print *, 'sum(x) is ', y
if (.not. y >= inf) then
error stop 1
end if
end program test_sum
```
Test:
```bash
uname -a && flang --version && flang test_sum.f90 && ./a.out
```
Result:
```text
Linux 6.5.0-28-generic #29~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Apr 4 14:39:20 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
flang-new version 19.0.0git (g...@github.com:llvm/llvm-project.git 37c175af955f0aeab67e8c553a0a47b2ed0fdba2)
Target: x86_64-unknown-linux-gnu
Thread model: posix
NaN Inf
sum(x) is NaN
Fortran ERROR STOP: code 1
IEEE arithmetic exceptions signaled: INVALID
```
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